Sign up to receive free email alerts when patent applications with chosen keywords are publishedSIGN UP

Abstract:

A touch input system including a stylus and a display device is provided.
The stylus includes a battery module, a touch portion, a transducer
module and a RF transmitting module. When a contact pressure is acted on
the touch portion, the touch portion is electrically connected to the
battery module by the contact pressure and emits a light signal. The
display region receives and reacts to the light signal, and the contact
pressure is transformed into an electrical signal by the transducer
module. The RF transmitting module is electrically connected to the
transducer module and transmitting the electrical signal. The display
device includes a display region and a RF receiving module.

Claims:

1-20. (canceled)

21. A touch input system, comprising: a stylus, comprising: a main body;
a battery module, disposed at the main body; a touch portion, disposed at
the main body, when a contact pressure is acted on the touch portion, the
touch portion is electrically connected to the battery module by the
contact pressure and emits a light signal; a magnetic element, fixed to
the touch portion; and a magnetic detector, fixed to the main body and
suitable for detecting a variation of a distance between the magnetic
element and the magnetic detector, and transforming the contact pressure
into an electrical signal based on the variation of the distance; and a
RF transmitting module, disposed at the main body, electrically connected
to the magnetic detector, and transmitting the electrical signal; and a
display device, comprising: a display region, detecting the light signal
to locate a touch position when the touch portion is exerted on the
display region; and a RF receiving module, electrically connected to the
display device and used to receive the electrical signal, wherein the
display region receives the electrical signal via the RF receiving
module, and the display region displays a line width according to the
electrical signal.

22. The touch input system as claimed in claim 21, wherein the RF
transmitting module is disposed at a back end of the stylus.

23. The touch input system as claimed in claim 21, wherein the battery
module is fixed to the main body, the touch portion is sliding disposed
at the main body, and the touch portion is suitable for being contacted
the display region to be pushed toward the battery module.

24. The touch input system as claimed in claim 23, wherein the stylus
further comprising: a conductive elastic element, disposed between the
touch portion and the battery module, wherein when the touch portion is
pushed toward the battery module, the elastic element is compressed
between the battery module and the touch portion.

25. The touch input system as claimed in claim 21, wherein the display
device includes a display region with an operation surface for touch
input.

26. The touch input system as claimed in claim 21, wherein the electrical
signal provides information for magnitude of the contact pressure.

27. The touch input system as claimed in claim 21, wherein the display
device further comprising: a light sensor array, arranged in a pixel
electrode array of the display region.

28. The touch input system as claimed in claim 27, wherein the light
signal emitted from the touch portion is suitable for actuating at least
one light sensor of the light sensor array.

Description:

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims the priority benefit of U.S. provisional
application Ser. No. 61/293,209, filed on Jan. 8, 2010. The entirety the
above-mentioned patent application is hereby incorporated by reference
herein and made a part of specification.

BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention generally relates to a touch input system.
More particularly, the present invention relates to an input device
suitable for emitting light and a touch screen using the input device.

[0004] 2. Description of Related Art

[0005] Display panels traditionally serve the role of displaying the
information or the output from a system, while other input device or
devices provide inputs to the system. Interactive devices, such as a
touch panel that can receive a user's input via touching the display
panel, combines both output and input functions and allow a user to
interact with the display or the system coupled to the display. As an
example, devices such as personal digital assistants (PDAs), mobile
phones, personal computers (PCs), tablet PCs, etc. have incorporated
touch panels for providing users with more input choices.

[0006] Conventional touch panels or touch screens have a number of
different designs, such as resistive type, surface-wave type, capacitive
type, and infrared-ray type designs. All of these designs typically
require combining a display device with a separate touch panel sheet. No
matter what type of touch panel, it tries to provide a more convenient
way for users, for example, the resistive type, surface-wave type,
capacitive type, and infrared-ray type touch panel are operated by users'
fingers or stylus. The in-cell type optical touch display panels could be
operated by light or shadow, and the touch position is located by photo
sensors designed in the in-cell type display panel. Therefore, touch
display panel includes a display panel suitable for sensing a light
signal emitted or blocked by a stylus to be operated. When a optical pen
used as a positional indicator of the in-cell type optical touch display
panel, the display panel is capable of displaying a line according to the
light signal emitted by the stylus. Several arrangements have been
proposed for an optical pen which has a pressure sensitive mechanism, and
allowed to produce a certain change when the pen pressure was applied
thereto.

SUMMARY OF THE INVENTION

[0007] The present invention is to provide a touch input system, including
a input device and a display device.

[0008] The present invention is to provide a stylus suitable for sensing
the depressing force by its pressure sensitive mechanism disposed in the
tip of the stylus. The stylus includes a main body and a touch portion,
wherein the main body comprises a pressure sensing mechanism, a
transducer module, an RF transmitting module, and a battery module. The
touch portion is disposed at the front of the main body, and is suitable
for contacting with the operation surface.

[0009] As embodied and broadly described herein, the present invention
provides a touch input system including an optical stylus and a display
device for locating the touch position by the optical stylus. The stylus
includes a main body and a touch portion capable of emitting light,
wherein the main body comprises a transducer module, a RF transmitting
module, and a battery module. The touch portion disposed at the front end
of the stylus is electrically connected to the battery module by the
contact pressure and emits a light signal continuously when a contact
pressure is acted on the touch portion. The display device includes a
display region, and a RF receiving module essentially consisted of a RF
receiver and a built-in antenna. The RF receiver is electrically
connected to the display region and the built-in antenna receives the
electrical signal within a predetermined frequency range.

[0010] Some example of the present invention may provide a stylus
including a housing and a touch portion. The housing has a front end, a
back end opposite to the front end and an opening formed at the front
end. The touch portion is sliding disposed at the opening along an axis,
wherein the touch portion is suitable for contacting an operation surface
to move into the housing. The housing has a capacity of a battery module
and a detector; in some cases, it further comprises a transducer module
and a RF transmitting module. A blocking plate is disposed in the middle
of the housing of the stylus, and is disposed between the battery module
and an elastic element. The detector is fixed to the blocking plate and
used for detecting a motion of the touch portion to obtain an analog
signal. The elastic element and the touch portion is located on the axis
of the housing, wherein the elastic element is fixed on the blocking
plate and the touch portion is sliding disposed at the opening, such that
the touch portion contacts the operation surface to move into the
housing, the elastic element is compressed between the blocking plate and
the touch portion. The touch portion is electrically connected to the
battery module and emits a light signal continuously while writing.
However, the touch portion is recovered by an elastic force of the
elastic element when the touch portion is distant from the operation
surface. Meanwhile, the electrical connection between the touch portion
and the battery module is terminated.

[0011] Another example of the present invention may provide a stylus
including a pipe, a touch portion, a first magnetic element and a second
magnetic element. The pipe has a front end, a back end opposite to the
front end and an opening formed at the front end, wherein a diameter of
the opening is smaller than a diameter of the pipe. The touch portion is
sliding disposed at the opening, and at least a part of the touch portion
is located in the pipe. The first magnetic element is disposed in the
pipe and having a through hole, and a diameter of the through hole is not
less than the diameter of the opening. Therefore, the second magnetic
element is fixed to the touch portion located in the pipe, and the first
magnetic element is located between the second magnetic element and the
opening. The second magnetic element is driven to move away from the
first magnetic element when the touch portion is driven to move toward
the back end by a force resisting a magnetic attractive force generated
between the first magnetic element and the second magnetic element.

[0012] Another example of the present invention may provide an input
device including a pipe, a touch portion, a protrusion and a switch
element. The pipe has a front end, a back end opposite to the front end
and an opening formed at the front end, wherein a diameter of the opening
is smaller than a diameter of the pipe. The touch portion is sliding
disposed at the opening, and a part of the touch portion is located in
the pipe. The protrusion, the switch element and the touch portion are on
the central axis of the stylus. The switch element is fixed and
electrically connected to the touch portion and has an elastic element to
provide an elastic force for recovery. When the touch portion is driven
to move toward the back end by a depressing force, the switch element is
also driven to contact the protrusion for actuating the touch portion to
emit a light signal continuously, and the elastic element is compressed
between the touch portion and the protrusion.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are included to provide a further
understanding of the invention, and are incorporated in and constitute a
part of this specification. The drawings illustrate embodiments of the
invention and, together with the description, serve to explain the
principles of the invention.

[0014]FIG. 1 illustrates a touch input system according to an embodiment
of the present application.

[0015]FIG. 2 partially illustrates a stylus during exerting according to
an embodiment of FIG. 1.

[0016] FIG. 3 illustrates a touch input system according to another
embodiment of the present application.

[0017]FIG. 4 partially illustrates a tip of the stylus leaves the
operation surface.

[0018]FIG. 5 illustrates a stylus according to further another embodiment
of the present application.

[0026] Reference will now be made in detail to the present embodiments of
the invention, examples of which are illustrated in the accompanying
drawings. Wherever possible, the same reference numbers are used in the
drawings and the description to refer to the same or like parts.

[0027]FIG. 1 illustrates a touch input system according to an embodiment
of the present application. FIG. 2 illustrates the touch portion contacts
the display region of FIG. 1. Referring to FIG. 1, the touch input system
100 includes a stylus 110 and a display device 120. The stylus 110 has a
two-terminal main body 112 including a front end 112a and a back end
112b, wherein the front end 112a is separated by a blocking plate 115.
The main body 112 comprises a transducer module 118 and an RF
transmitting module 119, and a battery module 114. The blocking plate 115
is disposed between the battery module 114 and an elastic conductor 117.
The front end 112a has an opening 112c at the pen tip, and the touch
portion 116 is sliding disposed in the opening 112c along an axis A. The
touch portion 116 may have a pillar 116a to extend into the front end
112a, and the pillar 116a, the elastic conductor and the touch portion
116 are all on the axis A. The axis A is perpendicular to the blocking
plate 115 and pass through the center of the stylus 110. An elastic
conductor 117, such as a metal spring or a conducting sponge, is directly
connected to the touch portion 116 or via pillar 116a, depending on the
function of the stylus. Whether the elastic conductor 117 is fixed to the
pillar 116a or the blocking plate 115, the pillar 116a is disposed
between the touch portion 116 and the elastic conductor 117, and they all
move along the axis A. Taking FIG. 1 for example, the three elements on
the axis A, including the touch portion 116, the pillar 116a and the
elastic conductor 117, can be regarded as a switch for lighting up the
touch portion 116. The touch portion 116 can be a light emitting diode
(LED), a light bulb, a laser, and so on. The transducer module is used
for transforming the contact pressure into an electrical signal by the
transducer module, and the electrical signal is directly proportional to
the contact pressure depressed by a user. The RF transmitting module is
electrically connected to the transducer module, and sending the
electrical signal to a RF receiving module embedded in the display
device. The RF transmitting module is essentially consisted of a RF
transmitter and an antenna for transmitting depressing pressure
information.

[0028] Referring to a display device 120, it includes a display region 122
with an operation surface of the display device 120 and an RF receiving
module 124. The display device 120 further includes a light sensor array
126 arranged in a pixel electrode array of the display region 122.
Examples of the light sensor array may be found in but are not limited to
commonly assigned applications, i.e., U.S. patent application Ser. No.
11/536,403, "Interactive Display Devices and Methods of Making the Same,"
filed Sep. 28, 2006, and U.S. patent application Ser. No. 11/777,887,
"Photo Detector Array with Thin-Film Resistor-Capacitor Network," filed
Jul. 13, 2007, which is a continuation-in-part of U.S. patent application
Ser. No. 11/534,680, "Photo Detector Array," filed Sep. 25, 2006. Other
sensor elements capable of supporting a touch panel based on a pressure
source or a non-touch panel based on an optical source may also be
applicable to the present invention. In one example, the display device
120 may include but is not limited to one of a photo-sensing panel, an
organic light-emitting diode (OLED) panel and a low temperature poly
silicon (LTPS) panel. Accordingly, the display region of the display
device 120 not only receives the light signal emitted by the optical
stylus, but also reacts to the depressing pressure exerted onto the
display region. The RF receiving module 124 embedded in the display
device 120 is essentially consisted of a receiving antenna and a RF
receiver.

[0029]FIG. 2 partially illustrates a stylus during exerting against the
display device according to an embodiment of FIG. 1. The light detector
113a is suitable for detecting a light 60 emitted by the light emitting
element 113b to obtain a variation of a distance between the light
emitting element 113b and the light detector 113a, wherein the
above-mentioned distance is shortened while the contact pressure acted on
the touch portion 116 is increased. The light detector 113a is, for
example, a photo transistor, a photo diode or a photo-sensitive resistor.
The light emitting element 113b preferably provides a wavelength that the
light detector 113a is sensitive to. The light 60 is detected by the
light sensor array 126 for locating touch position, and simultaneously
provided information for pressure strength operated by the user. One
skilled in the art will appreciate that the light 60 is not restricted to
a visible light, other electromagnetic wave, such as infrared light,
ultraviolet light or other radiation, can be sensed by the light detector
113a and the light sensor array 126 are favorable options. Referring to
FIG. 1 and FIG. 2, the touch portion 116 is exerted on the working plane,
such as display device 120, when a user is writing by the stylus 110. The
elastic conductor 117 would be compressed and electrically contact with
the battery module 114, such that the touch portion 116 emits the light
60. The light sensor array 126 embedded in the display device 120 is
capable of locating the touch position by sensing the light 60, but the
line width depicted by a user can not be shown. The detector 113a is
connected with the transducer module 118, and electrically connected with
the battery module 114. The detector 113a receives differential light
amount in accordance with distance between the touch portion 116 and the
detector 113a when the user is operating the stylus 110. The distance
between the touch portion 116 and the detector 113a is inverse
proportional to the depressing force from the user, and the light sensed
by the detector 113a will be converted to an analog signal. The analog
signal can be transmitted to the transducer 118, and converted to a
digital signal.

[0030] FIG. 3 is a schematic view illustrating another embodiment of the
present application. The main body 312 is, for example, a housing having
a front end 312a, a back end 312b opposite to the front end 312a and an
opening 312c formed at the front end 312a, wherein the touch portion 316
is sliding disposed at the opening 312c along an axis A. The battery
module 314 is disposed in the main body 312, and separated from the front
end 312a via the blocking plate 315. The elastic conductor 317 is, for
example, a spring and connected to the touch portion 316 to be located
between the touch portion 316 and the blocking plate 315 along the axis
A. When the touch portion 316 is pushed toward the back end 312b when
exerting the stylus 310 by a user, the elastic conductor 317 is
compressed between the blocking plate 315 and the touch portion 316.
Thus, when no depressing force is applied on the stylus (as FIG. 4
showing), the touch portion 322 is recovered by an elastic force of the
elastic conductor 317. In other embodiments, the elastic conductor 317
also could be an elastic metal slice or a magnet with a conductive formed
plastic. Referring back to FIG. 3, the touch portion 316 is sliding
disposed at the main body 312, when the touch portion 316 is applied to
the display region 322 to generate a force on the touch portion 316.
Then, the touch portion 316 will be driven to move toward the blocking
plate 315 and compress the elastic conductor 317. The touch portion 316
is electrically connected to the battery by the elastic conductor 317 and
the conductive pillar 316a and emits a light 50 continuously.
Simultaneously, the magnitude of the force will be sensed by the pressure
sensitive module consisted of detector 313a and emitting element 313b.

[0031] In this embodiment, the light 50 irradiated from the touch portion
316 is used for the light sensor array 326 embedded in the display device
320, not for detector 313a. The detector 313a fixed to a surface facing
the touch portion 316 of the blocking plate 315 is responsive to the
intensity of the light 70 while operating the stylus 310. The emitting
element 313b emitting the light 70 is fixed to a pillar 316a of the touch
portion 316. The detector 313a is used for detecting a light 70 emitted
by the light emitting element 313b to obtain a variation of a distance
between the light emitting element 313b and the light detector 313a. The
distance is shortened while the force acted on the touch portion 316 is
increased, and the light detector 313a is capable of transferring analog
signals with the magnitude of the force accordingly. Therefore, the
detector 313a and the emitting element 313b are regarded as a pressure
sensitive module, responsive to the force exerted by the user while
operating the stylus 310. The light 70 is only sensed by the detector
313a of the pressure sensitive module, because the irradiating direction
of the light 70 is opposite to the one of light 50. The type of the
detector 313a and emitting element 313b are not restricted, for example,
the emitting element 313b can be an electromagnetic wave emitting
element, such as LED, bulb, or laser, even other element emitting any
invisible radiation, and the detector 313a must be a sensor capable of
sensing the signal from the emitting element 313b, such as, a photo
transistor, a photo diode, a photo-sensitive resistor and so on.

[0032] In another embodiment, the emitting element 313b is a magnetic
element, the detector 313a is capable of detecting magnetic prosperity.
In other words, the pressure sensitive module includes a magnetic element
313b and a magnetic detector 313a. The magnetic element 313b is fixed to
the touch portion 316. The magnetic detector 313a is fixed to the
blocking plate 315 and suitable for detecting a magnetic force generated
between the magnetic detector 313a and the magnetic element 313b to
obtain a variation of a distance between the magnetic element 313b and
the magnetic detector 313a. The magnetic element 313b is, for example, a
magnet or any object suitable for generating magnetic force and the
detector 313a must be a sensor capable of sensing the signal from the
magnetic element 313b.

[0033] The transducer module 318 disposed in the main body 312 is used to
processing the signal from pressure sensitive module including detector
313a and emitting element 313b, and transforming the analog signal 70
into a digital format, wherein the intensity of the signal 70 is directly
proportional to the magnitude of the force exerted by a user. The RF
transmitting module 319 may be disposed at the back end 312b of the main
body, or at the wall of the main body 312 and electrically connected to
the transducer module 318. In one embodiment, the RF transmitting module
319 is used for transmitting digital signals within a predetermined
frequency range, and the RF receiving module 324 disposed in the display
device 320 is capable for receiving signals with the same specific
frequency, such that other signal out of the specific frequency range
regarded as an interference is prevented.

[0034] According to the present invention, the stylus is able to transmit
an electrical signal directly proportional to a contact pressure applied
to the touch portion of the stylus, and the display device is able to
receive the electrical signal to display image according to its
information. For example, a width of the line showed by the display
device is able to be promptly changed by respective electrical signals
transmitted from the stylus, such that the operation of the touch input
system is more flexible. Therefore, in addition to the location touched
by the stylus 310, the display region 322 shows line width responsive to
the magnitude of the signal 70 while writing. The touch portion 316 is
exerted on the display region 322 to generate the signals representing
line width on the display region 322 by the wireless communication. The
RF receiving module 324 is electrically connected to the display region
322 and receives the digital signal from the RF transmitting module 319
within a predetermined frequency range. The display region 322 is
suitable for displaying a line width depicted by the user according to
the signal 70 sensed by the detector 313a. In other words, the location
and the width of the line are both displayed on the display device 320,
the line width is changed by signals 70 and the line location is based on
signal 50, such that the operation of the touch input system 300 is more
flexible.

[0035]FIG. 5 illustrates a stylus according to further another embodiment
of the present application. FIG. 6 illustrates the touch portion contacts
the operation surface of FIG. 5. Referring to FIG. 5 and FIG. 6, the
stylus 410 includes a pipe 412, a touch portion 414, a first magnetic
element (a fixed magnetic element) 416 and a second magnetic element (a
moveable magnetic element) 418. The pipe 412 has a front end 412a, a back
end 412b opposite to the front end 412a and an opening 412c formed at the
front end 412a, wherein the diameter of the opening 412c is smaller than
the diameter of the pipe 412. The touch portion 414 is sliding disposed
at the opening 412c, wherein at least a part of the touch portion 414 is
located in the pipe 412.

[0036] The first magnetic element 416 fixed to the inner wall of the pipe
412 and has an annular shape, in which the diameter of the through hole
416a is larger or substantially equal to the diameter of the opening
412c, such that the touch portion 414 sliding disposed at the opening
412c can penetrate the through hole 416a. The second magnetic element 418
and the touch portion 414 are bonded together, and regarded as a signal
portion. When the depressing force is applied on the stylus, the touch
portion 414 and the second magnetic element 418 may move together. Due to
the size of the second magnetic element 418 is larger than the through
hole 416a, the second magnetic element 418 is always between the
conductive element 411 and the first magnetic element 416 whether the
exertion force is applied or not. As shown by this example, the first
magnetic element 416 is located between the second magnetic element 418
and the opening 412c. The exertion force is able to resist a magnetic
attractive force generated between the first magnetic element 416 and the
second magnetic element 418, at the same time, the second magnetic
element 418 is driven to move away from the first magnetic element 416
(as FIG. 6 shown).

[0037] The stylus 410 further includes a battery module 415, a detector
417 and a converter 419. The battery module 415 is disposed in the pipe
412 and includes a blocking plate 415a and at least a battery 415b
(showing two). The touch portion 414 is electrically connected to the
battery module 415 and emits a light signal 40 actuating the operation
surface 80. The detector 417 is suitable for detecting a magnetic force
produced from the second magnetic element 418 to obtain an analog signal
representing a variation of a distance between the second magnetic
element 418 and the detector 417, and the above-mentioned distance is
shortened while the contact pressure acted on the touch portion 414 is
increased. The converter 419 disposed in the pipe 412 is electrically
connected to the detector 417, and capable of transducing the analog
signal into a digital signal and outputting the digital signal to the RF
transmitting module 413. The RF transmitting module is essentially
consisted of a RF transmitter and a transmitting antenna, and is suitable
for transmitting the digital signal to the RF receiving module 90 by the
wireless communication. In this embodiment, a conductive element 411 is
disposed on the blocking plate 415a, and located between the blocking
plate 415a and the touch portion 414. The conductive element 411, for
example, a conductive sponge, would be compressed and electrically
contact with the battery module 415. When the exertion force is stronger
than the magnetic attractive force between the first and the second
magnetic element (416 and 418), the touch portion 414 is electrically
connected to the battery via the conductive element 411 and emits light
40. The magnetic attractive force is used for driving the touch portion
414 to recover from the state shown in FIG. 6 to the state shown in FIG.
5.

[0038] In another embodiment, the conductive element 411 is not
compressive, is just regarded as switch. A force exerted by a user is
stronger than the magnetic attractive force of the two magnetic elements
when writing, the touch portion 414 is electrically connected to the
battery via the conductive element 411 and emits the light 40. Once the
stylus is not been exerted, the conductive element 411 and the touch
portion 414 will be separated by the magnetic attractive force of the two
magnetic elements. The touch portion 414 may contact the operation
surface 80 and emit light while the contact pressure being stronger than
the magnetic attractive force of the two magnetic elements. In addition,
the third magnetic element could be added to enhance the separation
strength of the conductive element and the touch portion, the description
detailed in FIG. 7. FIG. 7 partially illustrates a stylus according to
further another embodiment of the present application. Comparing with the
stylus 410 of FIG. 5, the stylus 510 of FIG. 7 further includes a third
magnetic element 511. The third magnetic element 511 is disposed at the
blocking plate 515a and facing the second magnetic element 518, wherein a
magnetic repulsive force is generated between the second magnetic element
518 and the third magnetic element 511, such that a greater magnetic
force is provided for the touch portion 514 to recover. In one example,
the magnetic repulsive force acts as the elastic member to be recovered
easily in order to make the style of drawing smooth and easily.

[0039] FIG. 8 illustrates a stylus according to further another embodiment
of the present application. FIG. 9 illustrates the touch portion contacts
the operation surface of FIG. 8. Referring to FIG. 8 and FIG. 9, the
stylus 610 includes a pipe 612, a touch portion 614, a protrusion 616 and
a switch element 618. The pipe 612 has a front end 612a, a back end 612b
opposite to the front end 612a and an opening 612c formed at the front
end 612a, wherein a diameter of the opening 612c is smaller than a
diameter of the pipe 612. The touch portion 614 is sliding disposed at
the opening 612c, wherein at least a part of the touch portion 614 is
located in the pipe 612.

[0040] The stylus 610 further includes a battery module 615 and a
converter 617, and the protrusion 616. The battery module 615 is disposed
within the pipe 612 and includes a blocking plate 615a and at least a
battery 615b (showing two). The protrusion 616 is formed on the blocking
plate 615a of the pipe 612 and can be screwed forward or backward to
adjust the suitable distance between the protrusion 616 and the switch
element 618. The switch element 618 is fixed and electrically connected
to the touch portion 614 and has an elastic element 618a. When the touch
portion 614 is driven to move toward the back end 612b by an exertion
force, the switch element 618 is also pushed forward to contact the
protrusion 616 for actuating the touch portion 614 to emit a light signal
30 actuating the operation surface 20 (as FIG. 9 shown). The switch
element 618 comprises an elastic element 618a facing the protrusion 616
and the elastic element 618a is compressed between the touch portion 614
and the protrusion 616, such that an elastic force is provided by the
elastic element to drive the touch portion 614 to recover from the state
shown in FIG. 9 to the state shown in FIG. 8. For example, the protrusion
616 could also be an elastic element to provide a greater elastic force
for the touch portion 614 to recover.

[0041] In FIG. 9, the switch element 618 is turned on by the protrusion
616, such that the touch portion 614 emits a light signal 30 actuating
the operation surface 20. However, the light signal 30 is extinguished
when the tip of stylus 610 leaves the operation surface 20, as FIG. 8
shown. For example, the exertion force applied to the touch portion 614
may be sensed by a detector (not shown), and the detecting mechanism is
referring to other embodiment in the present invention. In other words,
the detector fixed on the blocking plate 615a also can be added when the
stylus is designed to combine the pressure-sensitive function to draw a
variable line width by a user's exertion force. In some examples, the
switch element 618 is not only a switch, but also integrates a detecting
function. In other examples, the detector is embedded in the protrusion
616 such that the protrusion 616 is capable of sensing the level of the
contact pressure. The contact pressure is generated between the operation
surface 20 and the touch portion 614 when exerting and transmitted to the
converter 617. The converter 617 is disposed in the pipe 612 and
electrically connected to the protrusion 616, wherein the converter 617
is suitable for transducing the analog signal into a digital signal and
outputting the digital signal to the RF transmitting module 619. The RF
transmitting module 619 is essentially consisted of a RF transmitter and
an antenna for transmitting depressing pressure information. The RF
transmitting module 619 is arranged to send the digital signal to the RF
receiving module 10 electrically connected to the operation surface 20.

[0042] In one embodiment, the protrusion 616 is, for example, screwed to
the blocking plate 615a, and a user can rotate the protrusion 616 to
adjust a distance between the protrusion 616 and the switch element 618.
In some embodiments, the protrusion 616 is designed in a constant
distance at the manufacturing stage. The switch element 618 is, for
example, electrically connected to the battery module 615 and the touch
portion 614 by conductive wires 613. In addition, the switch element 618
has two contacts in a Surface Mount Device (SMD) or four contacts in a
Dual In-line Package (DIP).

[0043]FIG. 10 illustrates a light emitting glove according to an
embodiment of the present application. FIG. 11 illustrates a finger
portion of the light emitting glove of FIG. 10. Referring to FIG. 10 and
FIG. 11, the light emitting glove 700 includes a glove 710, a control
circuit board 720, a plurality of light emitting elements 730 and a
plurality of connecting wires 740.

[0044] The glove 710 includes an outer layer 712 and an inner layer 714
and having a plurality of finger portions 710a-710e (FIG. 10 illustrates
finger portion 710a). The control circuit board 720 is disposed between
the outer layer 712 and the inner layer 714. The light emitting elements
730 are, for example, light emitting diode elements and disposed on the
finger portions 710a-710e respectively, wherein each of the light
emitting elements 730 has a micro switch assembly 732. The connecting
wires 740 are disposed between the outer layer 712 and the inner layer
714, wherein the light emitting elements 730 are electrically connected
to the control circuit board 720 by the connecting wires 740
respectively.

[0045] A user can wear the light emitting glove 700 and touch a display
panel by the finger portions 710a-710e. When one or more of the finger
portions 710a-710e contact(s) the above mentioned the display panel, the
corresponding micro switch assemblies 732 are pressed, and the
corresponding light emitting elements 730 are driven to emit light for
executing a touch input function. The touch input manner described in
FIG. 1 to FIG. 9 can be applied to the micro switch assembly 732
described here.

[0046] In this embodiment, the light emitting glove 700 further includes a
battery 750 and a plurality of rubber layers 760. The battery 750 is
disposed on the control circuit board 720 for providing electric power to
the control circuit board 720 and the light emitting elements 730. The
rubber layers 760 covers the ends of the finger portions 710a-710e
respectively and each of the rubber layers 760 has at least one (showing
two) heat dissipation opening 762 for dissipating the heat generated by
the corresponding light emitting element 730 or user's hand.

[0047] Referring to FIG. 10, each of the connecting wires 740 has a
plurality of curled portions 742 for being flexible, such that the user
wearing the light emitting glove 700 can crook his fingers without
pulling apart the connecting wires 740. In this embodiment, each of the
curled portions 742 is flattened between the outer layer 712 and the
inner layer 714 in order not to occupy the inner space of the glove 710.

[0048]FIG. 12 illustrates an operating manner of the light emitting glove
of FIG. 10. Referring to FIG. 12, the control circuit board 720 includes
a control circuit 722, an RF transmitting module 724 electrically
connected to the control circuit 722, a driver 726 electrically connected
to the control circuit 722 and a charging socket 724 for the battery 750
to be charged. The battery 750 provides electric power to the control
circuit 722. The control circuit 722 drives the RF transmitting module
728 to transmit an RF signal to the RF receiving module 54 of the
electronic device 50, such that a touch input function of a touch panel
52 of the electronic device 50 is turned on.

[0049] When a user wearing the light emitting glove 100 contacts a touch
panel 52 of an electronic device 50 by fingers, the micro switch assembly
732 is pressed, and the control circuit 722 drives the light emitting
element 730 to emit light by the driver 726, and the touch panel 52
receives the light emitted by the light emitting element 730, such that a
touch input function is executed. Those skilled in the art should
appreciate that any of the aforementioned embodiments and combinations
could be applied in the finger portions 710a-710e.

[0050] In summary, the stylus of the present invention is able to transmit
an electrical signal directly proportional to a contact pressure applied
to the touch portion of the stylus, and the display device is able to
receive the electrical signal to display a line width according to the
electrical signal. In other words, a width of the line displayed by the
display device is able to be changed by different electrical signals
transmitted from the stylus, such that the operation of the touch input
system is more flexible. In addition, when the touch portion of the
stylus contacts an operation surface and a contact pressure is applied to
the touch portion, the touch portion is pushed toward and electrically
connected to the battery module to emit light signal actuating the
operation surface, such that the operation of the stylus is facilitated.

[0051] It will be apparent to those skilled in the art that various
modifications and variations may be made to the structure of the present
invention without departing from the scope or spirit of the invention. In
view of the foregoing, it is intended that the present invention covers
modifications and variations of this invention provided they fall within
the scope of the following claims and their equivalents.